Joseph heeebtjegee



(No Model.) I

J. HERB-BURGER.

DAMPER FOR UPRIGHT PIANQS.

No. 367,521. Patented Aug. 2, 1887.

INVENTEIR WITNES 5E5 QMLWVM N. PETERS. Phuln-Lilhugmpher. Washin ton, D.c.

usual.

UNITED STATES JOSEPH I-IERRBURGER,

PATENT OFFICE.

OF PARIS, FRANCE.

DAMPER FOR UPRIGHT PIANOS.

SPECIFICATION fcrmingpart of Letters Patent No. 367,521, dated August 2,1887.

Application filed June 7, 1887.

To aZZ whom, it may concern:

Be it known that I, JOSEPH HERRBURGER, of Paris, France, but temporarilya resident of the city of New York, county and State of New York, haveinvented a new and Improved Damper for Upright Pianos, of which thefollowing specificationis a full, clear, and exact description.

This invention relates to an improvement upon Letters Patent No.350,625, granted to me October 12,1886. In that patent I have shown thedamper-head to be connected to the wire-earryi11g stud by means of anintermediate block. I now dispense entirely with the block; and in orderto permit the headto be set at any desired angle to the wire I make thestud circular in cross-section,instead of square, thus permitting theangle to be changed by a slight turning of the stud.

The invention consists in the features of improvement, more fullypointed out in the claim.

In the accompanying drawings, Figure 1 is a side View of inyimproveddamper. Fig. 2 is a longitudinal central section thereof. Fig. 3

is a top view thereof, and Fig. i a detail side View of the stud.

The letter a represents the damper-lever at tached to hammer-rail byflange b,pivoted at c, the lever carrying the damper-wire d, all as Thedamper proper consists of two Serial No. 240.515. (No model.)

parts, a cushioned wooded head, 0, which has a reduced end, 6, and of ascrew-threaded metal pin or stud,f, which is received by acorrespondingly-threaded mortise of the re- 5 duced end 6. The upper orfree end of the stud f is provided with a transverse perforation toreceive the end of the wire d. This wire is held in placebyaclamp-screw, 9, that passes into stud f, as shown. The stud f 0should be circular in cross-section. In order to incline the head to thestring 72 Fig. 3, it is simply necessary to slightly turn the stud inits screw-threaded socket. The threads of the stud should be finely cut,so that a slight turn 5 will not noticeably raise or lower the damper;but, if necessary, the wire (I may be slightly bent tocompensate for thechanged position of the damper. By this construction I dispense entirelywith an intermediate block and 50 produce an easily-adjustabledamper.

I claim as my invention- The combination of cushioned damperhead 6, withthe round screw-threaded stud f, received Within a screw-threadedmortise of said 55 head and provided with a transverse perforation, andwith the set-screw g, substantially as specified.

JOSEPH HERRBURGER.

\Vitnesses:

F. v. BRIEsEN,

W. PARTINGTON.

